Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"va nghe chat snippets" » "va nghe chan snippets", "va nghe cat snippets", "va nghi chat snippets", "van nghe chat snippets", "ve nghe chat snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("va nghe chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va nghe chat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va nghe chat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va nghe chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.